Modern solid-state lasers with high beam outputs allow fast welding speeds for narrow seam widths - and provide a high level of penetration at the same time. Fast welding with small beam diameters leads to smaller process windows as far as beam positioning is concerned. This can result in defects due to lack of fusion. The exact positioning of the laser beam in combination with control of the effective seam position is therefore prerequisite for a reliable welding process.
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